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Alternators

Alternators
The speed of a salient pole machine is nearly

1000 rpm
1500 rpm
500 rpm
3000 rpm

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Alternators
When two alternators are running in exact synchronism, the synchronising power will be

None of the listed here
Zero
Unity
Sum of the output of two

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Alternators
The power factor of an alternator is determined by its

Load
Excitation
Speed
Primemover

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Alternators
In an alternator, the effect of armature reaction is minimum at power factor of ______

0.5 lagging
Unity
0.866 leading
0.866 lagging

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Alternators
Excessive windage loss and noise occur with

Either cylindrical or salient
Cylindrical rotors
None of the listed here
Salient pole rotors

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Alternators
In an alternator the armature reaction is mainly influenced by

Speed of the alternator
Short circuit ratio
The power factor of the load
Total current drawn

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MORE MCQ ON Alternators

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